6623961 has 4 divisors (see below), whose sum is σ = 8831952. Its totient is φ = 4415972.

The previous prime is 6623959. The next prime is 6623963. The reversal of 6623961 is 1693266.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (6623959) and next prime (6623963).

It is a cyclic number.

It is not a de Polignac number, because 6623961 - 2¹ = 6623959 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6623963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1103991 + ... + 1103996.

It is an arithmetic number, because the mean of its divisors is an integer number (2207988).

Almost surely, 2^6623961 is an apocalyptic number.

It is an amenable number.

6623961 is a deficient number, since it is larger than the sum of its proper divisors (2207991).

6623961 is a wasteful number, since it uses less digits than its factorization.

6623961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207990.

The product of its digits is 11664, while the sum is 33.

The square root of 6623961 is about 2573.7056941305. The cubic root of 6623961 is about 187.8044688810.

The spelling of 6623961 in words is "six million, six hundred twenty-three thousand, nine hundred sixty-one".